This paper examines the effective deployment of conversational agents in virtual worlds from the perspective of researchers/practitioners in cognitive psychology, computing science, learning technologies and engineering. From a cognitive perspective, the major challenge lies in the coordination and management of the various channels of information…

Most of the Virtual Learning Environment (VLE) design methods focus on producing content for a VLE. However, usability of the VLE is also of great importance. Several potential usability problems have been reported in recent e-learning conferences. These problems could have been avoided by applying usability engineering methods before the VLE was…